带H:MM:SS的天文台表

Question

如何用H:MM:SS显示天文台表？我读MM:SS和H:MM:SS默认显示.我发现只有MM:SS.

这是我的MM代码:带开始和停止按钮的SS.

public class MainActivity extends AppCompatActivity {

Button start,stop;
Chronometer chrono;
long time;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    start = (Button) findViewById(R.id.start);
    stop = (Button) findViewById(R.id.stop);
    chrono = (Chronometer) findViewById(R.id.chronometer);

 start.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

           chrono.setBase(SystemClock.elapsedRealtime());


            chrono.start();
        }
    });

    stop.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            chrono.stop();

        }
    });


}

}

这是我的MainActivity的xml代码:

    <Chronometer
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/chronometer"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Start"
    android:id="@+id/start"
    android:layout_centerVertical="true"
    android:layout_centerHorizontal="true" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Stop"
    android:id="@+id/stop"
    android:layout_below="@+id/start"
    android:layout_centerHorizontal="true" />

Answer 1

带H:MM:SS的天文台表

使用setOnChronometerTickListener将时间分为分钟,小时和秒.

用这个 ......

Chronometer chrono  = (Chronometer) findViewById(R.id.chronomete);
chrono.setOnChronometerTickListener(new OnChronometerTickListener(){
        @Override
            public void onChronometerTick(Chronometer chronometer) {
            long time = SystemClock.elapsedRealtime() - chronometer.getBase();
            int h   = (int)(time /3600000);
            int m = (int)(time - h*3600000)/60000;
            int s= (int)(time - h*3600000- m*60000)/1000 ;
            String t = (h < 10 ? "0"+h: h)+":"+(m < 10 ? "0"+m: m)+":"+ (s < 10 ? "0"+s: s);
            chronometer.setText(t);
        }
    });
    chrono.setBase(SystemClock.elapsedRealtime());
    chrono.setText("00:00:00");

编辑

开始

全局声明一个长变量timeWhenStopped.它保持时间.

private long timeWhenStopped = 0;

启动监听器... 获取时间,然后从那里开始.

 start.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            chrono.setBase(SystemClock.elapsedRealtime() + timeWhenStopped);
            chrono.start();
        }
    }); 

停止监听.... 存储时间和停止时间.

stop.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            timeWhenStopped = chrono.getBase() - SystemClock.elapsedRealtime();
            chrono.stop();

        }
    });

喜欢编码............